OK, folks, look at it from an economics standpoint:  Why would a company tell
you that you have to dilute their product if they didn't have a good reason?
Wouldn't it be in their best interest to have you use as much as possible?
I'm surprised they don't tell you to change it every 3000 miles, that would be
a money-maker.

If straight antifreeze worked well, (not even best, just well), they would
tell you to use it straight and would be selling you twice as much product.  And
you can guarantee they would take that opportunity if they could.

Money talks, and it says "dilute your antifreeze".

Bill Marshall
85 GL Tiico "Pandora's Box"
Aurora, IL